A quadratic function has a zero (x-intercept) at -3 and a vertex of (2,5) whats the function in vertex form

For what values of b will f(x)= logbx be a decreasing function? (16 )

What is the result of the following division?

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b